Key-seating machine



(N0 Model.) 3 Sheets-Sheet 1.

D. W. PORTER. KEY SEATING MACHINE.

No. 325,695. Patented Sept. 8,1885.

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(No Model.)

B. W. PORTER. KEY SEATING MACHINE.

ND. 325.695. Patented Sept. 8, 1885.

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DAVID YV. PORTER, OF PITTSBURG, PENNSYLVANIA.

KEY-SEATING MACHINE.

EPESIFIGATION forming part of Letters Patent No. 325,695, dated September 8, 1885.

Application filed April 27, 1885. (So model.)

To aIZZ whom it may concern:

Be it known that I, DAVID W. PORTER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Key-Seating Machines; and I do hereby declare that the following is afull, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification.

My invention relates to machines for cutting seats or grooves in the eyes of pulleys and band-wheels, 850., to fasten them upon shafts,

and contemplates the forward and backward movement of the cutting device by machinery properly manipulated, as will be hereinafter specifically described, and pointed out in the claims.

The accompanying drawings illustrate what I consider the best means for carrying my invention into practice.

Figure 1 is a rear elevation of my machine applied to a wheel or pulley. Fig. 2 is a plan View of the same removed from the pulley. Fig. is afront elevation of the machine. Fig. 4 is an end view with parts in section. Fig. 5 is a perspective view of an open bushing top placed round the mandrel when the latter is too small for the eye of the pulley. Fig. 6 is a perspective view of the mandrel and rack bar with cutter on its end. Fig; 7 is a perspective view of a wedge-piece used in regulating the feed. Fig. 8 is aside elevation of a machine of the sort which forms the inventiou in this application, mounted in a frame which is stationary. Fig. 9 is a plan of the same machine. Fig. 1.0 is a cross-section of the bed-plate having guideways upon it for the work-table to move and be held upon.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

The various parts of the device in'the movable machine (shown in Figs. 1 to 7) are mounted upon a suitable frame, A. The

mechanism which is provided for operating the cutter to make the groove is mounted upon one side of the said frame, which, for convenience, we will denominate the front side, while the mechanism for withdrawing the cutter after each forward movement is mounted upon the opposite side, which, for convenience,

will be termed the rear side. The mandrel Gis passed through the eye of the hub of wheel B, and held from slipping off the wheel by the projection or stud g. In a groove or way in the mandrel G the bar a is moved forward and backward, making the cut by means of the cutter in the cutter-head b on one end of the bar on the forward movement. For the greater part of its length the bar a is formed with cogs or rack-teeth, as shown, which afford means for engaging it to cause its movements. The forward effective movement of the bar a is brought about by the pinion d on shaft (3 engaging with the rack-teeth on bar a. The shaft 0 is rotated through the medium of a train of gearing from a conepulley, q, mounted loosely on shaft 0, as will hereinafter be explained. The shaft 0 is journaled in bearings in the carriage F, which is movable back and forth on the dovetailed way 0, secured upon the frame A.

On a stud or short shaft, t, secured to carriage F, are fixed the gears S and a, the former of which engages with a gear, 1*, fast to pulley 11, but loose upon shaft 0, while the gear it engages with the gear (1*, which is tixed upon shaft 0. Through the medium of gear d on shaft 0, the bar a will be moved forward to make a cut when said gear engages the bar, as shown in the drawings; but as soon as the carriage F is drawn back and the gear (I disengaged from rack a the said rack will be released and free to be withdrawn or moved backward. The spring i, fastened at one end to the carriage F and at the other to a fixed stud or projection, j, on frame A, cxerts its force to draw the carriage back and cause the disengagement above referred to; but the force of the spring is controlled and prevented from producing this effect at all times by a pin, 0, protruded through frame A into the path of the carriage and just back of it when the carriage is in position to cause engagement of the rack and gear, as shown in the drawings. The pin 6 will therefore prevent the spring from disengaging the gears as long as it is protruded through the frame to engage the rear side of the carriage, and it is so protruded until the entire forward movement of bar a is made, and when said movement is completed the pin 6 is withdrawn automatically and the force of the spring liberated to draw the carriage back. To effect this purpose, the pin 6 is mounted upon a lever, f, which is pivoted at g to a bracket on the frame or board A, and extended forward to come in the path of the bar a at the end of its forward movement, when, by means of a projection, h, upon bar a, the lever f is tripped and the pin 0 withdrawn, the carriage pulled back, and the gear disengaged, as already described. To again engage the gear and rack, a lever, 7c, is provided, which is pivoted and jointed as shown, and by the proper movement of which the carriage F will be thrown forward and the pin 0 on lever f will be protruded to hold the carriage engaged. The protrusion of the pin 6 is effected by having the end of lever f on which it is placed lighter than the opposite end, so that the pin will be protruded by the overbalance of the lever. While the pin 0 is withdrawn and carriage F pulled back the bar a is free to be withdrawn or moved back, and this is efi'ected by the mechanism which will now be explained, and which, as already stated, is placed upon the rear side of the frame A. Said mechanism consists in part of a shaft, Z, mounted in the carriage E, which works in the ways D. The shaft Z bears the gear-wheel m, which engages with rack-bar a to move it backward. Connection is made to shaft Z from pulley (1 through the gears r and S to loose or idle wheel 1; on stud 1;, formed on or secured to carriage E, thence to gear a, loose on shaft Z, and, when desired, to shaft Z by means of the friction-clutch 0, opera ed by lever 19, to en gage or disengage shaft Z with gear n. This clutch is brought into requisition when it is desired to rotate wheel at and withdraw the bar a by being caused to engage by friction or otherwise with the side of wheel at through the medium of the clutch-lever. A set-screw,x,let through part D, serves to move carriage E,so as to cause a deeper or shallower engagement of wheel at and rack a. This set-screw m is especially useful in connection with the feed-wedge 3 which, as clearly shown in Fig. 2, is let in behind the bar a and moved up or down by screw 2 and nut under arm .2 of wedge y. By moving this farther up the feed is made stronger,while by lowering it the feed is made lighter. If the wedge should not prove sufficient, a rectangular piece is set in behind the wedge.

In the machine,which is mounted in a stationary frame, no changes are made in the working parts of the machine. It is simply mounted on a standard, A, with a screw, D, and hand-wheel E, for raising or lowering it as required to suit different pulleys. Atable, C is also provided for holding the wheel or pulley, and this is set upon rails formed on the bed-plate B. The bushing H is employed to enlarge the mandrel when necessary to make it fit the eye of a wheel.

Having thus described my invention, what I desire to claim, and secure by Letters Patent, is

1. The combination, with the rack-bar a, bearing the cutter-head, of the pinion d, and movable shaft 0, upon which it is mounted, and means, substantially as described, for automatically withdrawing the carriage upon which the shaft 0 is mounted.

2. The combination, with the rack-bar a, pinion d, and shaft 0, of the movable carriage F, in which said shaft is mounted, the spring 1' for withdrawing the carriage, and the lever f,provided with pin 6 for holding the carriage,

as set forth.

3. The combination of the rack-bar a, the pinion d, shaft 0, and movable carriage F, in which said shaft is mounted, with the spring i, for withdrawing the carriage, and the lever f, upon which the pin 6 is mounted, with the opposite end of which lever the bar a comes in contact at the end of its forward movement.

4. The combination of the rack-bar a, pinion d, and movable shaft, with the spring for withdrawing the carriage upon which shaft is mounted and the lever k for throwing it back into engagement, as set forth.

5. The combination of the rack-bar a, the movable shaft and pinion, the spring for withdrawing the shaft, and the second pinion for withdrawing or moving the rack-bar backward mounted upon another shaft.

6. The combination,with the shaft 0, pulley q, and gear r, loose thereupon, and gear 0*, fast thereon, of the gears S and u, and the gears 22 and n, the latter being loose on shaft Z, and the friction-clutch 0 also on said shaft Z, and pinion m, all arranged to operate as set forth.

7 The combination of the rack-bar a, pinion m, and shaft Z, with the carriage E, and set-screw w, as and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 31st day of March, 1885.

DAVID WV. PORTER.

Witnesses:

H. T. MoRRIs. WILLIAM 1?. Homes. 

